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Articles 481 - 510 of 3840
Full-Text Articles in Physical Sciences and Mathematics
Adaptive Optics System Baseline Modeling For A Usaf Quad Axis Telescope, Nathaniel R. Morris
Adaptive Optics System Baseline Modeling For A Usaf Quad Axis Telescope, Nathaniel R. Morris
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Atmospheric turbulence has afflicted accurate observations of celestial bodies since man first gazed upon the stars. In this past century, the technology of adaptive optics was invented to help compensate for the optical distortions that atmospheric turbulence causes. As part of that technology, artificial guide stars, wave front sensors, deformable mirrors, and other optical components were developed to correct these wave aberrations. The purpose of this study focuses on the modeling and configuration of an adaptive optics system that is appropriate for the John Bryan Observatory Quad Axis Telescope System (JBO-Q), which is funded by the United States Air Force. …
Configuration And Electronic Properties Of The Interface Between Lead Iodide Hybrid Perovskite And Self-Assembled Monolayers In Solar Cells, Parin Divya Amlani
Configuration And Electronic Properties Of The Interface Between Lead Iodide Hybrid Perovskite And Self-Assembled Monolayers In Solar Cells, Parin Divya Amlani
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Hybrid perovskite photovoltaic materials are currently the most promising functional materials for solar cell applications with efficiency reaching to those of more conventional materials such as silicon. Using self-assembled monolayers between photovoltaic materials and electrodes is a method for improving the stability and functionality. Recent experiments have shown that using 4-mercaptobenzoic acid and pentafluorobenzenethiol monolayers bridging lead iodide hybrid perovskite photovoltaic materials and electrodes result in improved stability and efficiency. The details of monolayer assembly, molecular adsorption configuration, and resulting modification of electronic properties are important characteristics related to solar cell performance. These characteristics can be obtained through accurate computer …
Development Of Computer Program For Wind Resource Assessment, Rotor Design And Rotor Performance, Valentina Jami
Development Of Computer Program For Wind Resource Assessment, Rotor Design And Rotor Performance, Valentina Jami
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People understand and have seen that renewable energy has many advantages over conventional energy sources. Because of these advantages, more and more emphasis has been given to generating electrical energy with renewable sources. Among the many renewable and conventional ways currently available for a society to generate electrical power, wind turbines are one of the cheapest ways of doing this. The main objective of this thesis work is to develop a computer program that assesses the wind resource at a given location, designs a wind turbine rotor for optimum power capture for one wind speed, and analyzes the performance of …
Collaboratively Detecting Http-Based Distributed Denial Of Service Attack Using Software Defined Network, Ademola A. Ikusan
Collaboratively Detecting Http-Based Distributed Denial Of Service Attack Using Software Defined Network, Ademola A. Ikusan
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Over the years, there have been a lot of attacks on the web servers of critical companies and organization. As much as these organizations tighten their security, it always tends not to be enough to stop all the attacks towards their servers. These attack vectors are so difficult to stop because of the technicalities behind the attack. Furthermore, there are different classes of distributed denial of service(DDoS) attacks such as the high rates (SYN Flood attacks, ARP Flood attacks, etc), low-rate(HTTP-GET, HTTP-POST). Although there are different ways to stop high rate DDoS attacks by traffic sampling and detecting malformed packets …
Finding Street Gang Member Profiles On Twitter, Lakshika Balasuriya
Finding Street Gang Member Profiles On Twitter, Lakshika Balasuriya
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The crime and violence street gangs introduce into neighborhoods is a growing epidemic in cities around the world. Today, over 1.4 million people, belonging to more than 33,000 gangs, are active in the United States, of which 88% identify themselves as being members of a street gang. With the recent popularity of social media, street gang members have established online presences coinciding with their physical occupation of neighborhoods. Recent studies report that approximately 45% of gang members participate in online offending activities such as threatening, harassing individuals, posting violent videos or attacking someone on the street for something they said …
Chemical Applications In Techniques Of Emerging Significance: Nanoparticle Transformation In Mitochondria And Relative Tautomer Populations In Cellular Automata, Gregory Arland Bowers
Chemical Applications In Techniques Of Emerging Significance: Nanoparticle Transformation In Mitochondria And Relative Tautomer Populations In Cellular Automata, Gregory Arland Bowers
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Two techniques of emerging importance were used to study different biochemical phenomena: the fate of silver nanoparticles in Vero 76 African green monkey kidney cell mitochondria, and the effect of pH on tautomer ratios using cellular automata. In the first area of research Vero 76 Africa green monkey kidney cells were incubated with silver nanoparticles (AgNP) and ionic silver (Ag+). After 24 hours the cell mitochondria were harvested, then processed with CPE-TFF and ICP-OES. The initial AgNP incubation formed 52.9% ± 15.5% AgNP and 29.9% ± 4.0% Ag+, while the ionic silver incubation formed 9.5% ± 0.9% AgNP and 60.6% …
The Synthesis And Characterization Of Double And Triple Tethered Indeno[2.1-C]Fluorendiones, Daniel K. Greene
The Synthesis And Characterization Of Double And Triple Tethered Indeno[2.1-C]Fluorendiones, Daniel K. Greene
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A series of terephthalate esters was synthesized via a Diels-Alder reaction between 2,5-dicarboethoxy-3,4-diphenylcyclopentadienone and various alkynes in order to study reaction conditions necessary to synthesize poly(indeno[2,1-c]fluorene-5,8-dione)s. Diethyl 2,3-diphenyl-5-butylterephthalate, 1,4-bis(3,4-diphenyl-2,5-di(ethoxycarbonyl) phenyl)butane and N,N,N-tris(3,4-diphenyl-2,5-di(ethoxycarbonyl)phenylmethyl)amine were synthesized and characterized by IR, 1H NMR, 13C NMR, 13C NMR DEPT135 spectroscopies as well as elemental composition. Hydrolysis conditions of the terephthalates using potassium hydroxide were also investigated. It was found that large stoichiometric equivalents of base coupled with reaction times over twenty-four hours afforded only partially hydrolyzed products. The synthesis of 6-butylindeno[2,1-c]fluoren-5,8-dione was successfully carried out by the sulfuric acid catalyzed, intramolecular, Friedel-Crafts cyclization of …
Semantic Web Foundations For Representing, Reasoning, And Traversing Contextualized Knowledge Graphs, Vinh Thi Kim Nguyen
Semantic Web Foundations For Representing, Reasoning, And Traversing Contextualized Knowledge Graphs, Vinh Thi Kim Nguyen
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Semantic Web technologies such as RDF and OWL have become World Wide Web Consortium (W3C) standards for knowledge representation and reasoning. RDF triples about triples, or meta triples, form the basis for a contextualized knowledge graph. They represent the contextual information about individual triples such as the source, the occurring time or place, or the certainty. However, an efficient RDF representation for such meta-knowledge of triples remains a major limitation of the RDF data model. The existing reification approach allows such meta-knowledge of RDF triples to be expressed in RDF by using four triples per reified triple. While reification is …
Characterizing Concepts In Taxonomy For Entity Recommendations, Siva Kumar Cheekula
Characterizing Concepts In Taxonomy For Entity Recommendations, Siva Kumar Cheekula
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Entity recommendation systems are enormously popular on the Web. These systems harness manually crafted taxonomies for improving recommendations. For example, Yahoo created the Open Directory Project for search and recommendation, and Amazon utilizes its own product taxonomy. While these taxonomies are of high quality, it is a labor and time-intensive process to manually create and keep them up to date. Instead, in this era ofWeb 2.0 where users collaboratively create large amounts of information on the Web, it is possible to utilize user-generated content to automatically generate good quality taxonomies. However, harnessing such taxonomies for entity recommendations has not been …
Sched-Its: An Interactive Tutoring System To Teach Cpu Scheduling Concepts In An Operating Systems Course, Bharath Kumar Koya
Sched-Its: An Interactive Tutoring System To Teach Cpu Scheduling Concepts In An Operating Systems Course, Bharath Kumar Koya
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Operating systems is an essential course in computer science curriculum, which helps students to develop a mental model of how computer operating systems work. The internal mechanisms and processes of an operating system (OS) are often complex, non-deterministic and intangible which makes them difficult for students to understand. One such concept is central processing unit (CPU) scheduling. CPU scheduling forms the basis of the multiprogramming in an OS. In practice, OS courses involve classroom lectures describing high-level abstractions of the concepts, and students complete programming assignments to apply the material in a more concrete way. Depending on the programming assignments, …
A Rhetoric To Climate Change Fashion: Base Of The Biomass Pyramid Is An Underestimated Carbon Sink, Syed Abbas, Ehjaz R. Abbas
A Rhetoric To Climate Change Fashion: Base Of The Biomass Pyramid Is An Underestimated Carbon Sink, Syed Abbas, Ehjaz R. Abbas
Journal of Bioresource Management
This writing is an attempt to present few wild ideas, rhetoric to climate change fashion. We discussed the possibility of escaped fertilizers being produced globally and their possible role in capturing atmospheric carbon believing that some factors of climate change are being ignored while other are being over emphasized.
A Study On Avifauna Present In Different Zones Of Chitral Districts, Madeeha Manzoor, Adila Nazli, Sabiha Shamim, Fida Muhammad Khan
A Study On Avifauna Present In Different Zones Of Chitral Districts, Madeeha Manzoor, Adila Nazli, Sabiha Shamim, Fida Muhammad Khan
Journal of Bioresource Management
Chitral is a unique division ofPakistanin North western extremes of the country lies in the Hindukush range. Because of its isolation from other adjacent areas, its ecology is least disturbed and also lacks the proper scientific checklist of its flora and fauna. This study is designed to explore its various regions to gather the data of both Passerines and Non- passerines currently present in the region. Several visits will be made, birds will be searched, pictures will be taken and after identification checklist will be formulated and its comparison with existing data will be reported.
A Study On Status And Distribution Of Passeriformes In Bagh District Of Azad Kashmir, Zahid Bhatti
A Study On Status And Distribution Of Passeriformes In Bagh District Of Azad Kashmir, Zahid Bhatti
Journal of Bioresource Management
The Passeriformes is the largest and most diverse commonly recognized clade of birds including more than seventy families. The reed beds are important habitats for several passerine bird species and the abundance of these species seem to be influenced by vegetation structure. Passerines feed mainly on insects, nuts and seeds collected from trees and shrubs in summer. In winter their feeding behavior changes and they feed on berries and fruits (Roberts, 1992). This study was conducted to prepare and compare the new checklist and distribution of Passeriformes in District Bagh in Azad Kashmir with the previous one for getting new …
Rescue And Rehabilitation Of An Indian Rock Python (Python Molurus): First Case Study From Pakistan, Fida Muhammad Khan, Fakhar-I- Abbas, Adila Nazli, Madeeha Manzoor, Zahid Iqbal Khan
Rescue And Rehabilitation Of An Indian Rock Python (Python Molurus): First Case Study From Pakistan, Fida Muhammad Khan, Fakhar-I- Abbas, Adila Nazli, Madeeha Manzoor, Zahid Iqbal Khan
Journal of Bioresource Management
Pythons are facing the threat of extinction due to human annihilation and interference in natural habitats of pythons. Indian rock python (Python molurus) has been stated as Lower Risk/Near Threatened by International Union for the Conservation of Nature (IUCN). Therefore, there is an intense need to change the perception of people and encourage them to coincide with this big snake. Current study involved the rescue and rehabilitation of an Indian rock python (P. molurus) spotted at the shrine of Baba Shah Jeevan, Rawalpindi, Pakistan. Python was grasped by skilled snake catchers and taken to the wildlife …
Projective-Planar Graphs With No K3,4-Minor. Ii., John Maharry, Dan Slilaty
Projective-Planar Graphs With No K3,4-Minor. Ii., John Maharry, Dan Slilaty
Mathematics and Statistics Faculty Publications
The authors previously published an iterative process to generate a class of projectiveplanar K3,4-free graphs called ‘patch graphs’. They also showed that any simple, almost 4-connected, nonplanar, and projective-planar graph that is K3,4-free is a subgraph of a patch graph. In this paper, we describe a simpler and more natural class of cubic K3,4- free projective-planar graphs which we call M¨obius hyperladders. Furthermore, every simple, almost 4-connected, nonplanar, and projective-planar graph that is K3,4-free is a minor of a M¨obius hyperladder. As applications of these structures we determine the page number of patch graphs and of M¨obius hyperladders.
Coursenetworking And Community: Linking Online Discussion Networks And Course Success, Adrienne L. Traxler, Andrew Gavrin, Rebecca Lindell
Coursenetworking And Community: Linking Online Discussion Networks And Course Success, Adrienne L. Traxler, Andrew Gavrin, Rebecca Lindell
Physics Faculty Publications
Large introductory science courses are isolating for many students, and reducing this isolation is an important factor for student retention in college. Active learning courses often build community among students as an explicit goal, but many commuter or non-traditional students have limited on-campus time. Online discussion forums provide one tool for engaging students with each other outside of class time. This study uses social network analysis with forum data from an introductory physics course to examine students' positions in the class discussion network and link it to their final course grades. We find that, contrary to expectations, there is no …
Preliminary Investigation Of Walking Motion Using A Combination Of Image And Signal Processing, Bradley Schneider, Tanvi Banerjee
Preliminary Investigation Of Walking Motion Using A Combination Of Image And Signal Processing, Bradley Schneider, Tanvi Banerjee
Kno.e.sis Publications
We present the results of analyzing gait motion in first-person video taken from a commercially available wearable camera embedded in a pair of glasses. The video is analyzed with three different computer vision methods to extract motion vectors from different gait sequences from four individuals for comparison against a manually annotated ground truth dataset. Using a combination of signal processing and computer vision techniques, gait features are extracted to identify the walking pace of the individual wearing the camera as well as validated using the ground truth dataset. Our preliminary results indicate that the extraction of activity from the video …
Toxic Effect Of Lead Chloride On Antioxidant Enzyme In The Liver And Kidney Of Fish, Bakhtawar Raza, Muhammad Javed, Faiza Ambreen, Fariha Latif
Toxic Effect Of Lead Chloride On Antioxidant Enzyme In The Liver And Kidney Of Fish, Bakhtawar Raza, Muhammad Javed, Faiza Ambreen, Fariha Latif
Journal of Bioresource Management
The contamination of aquatic habitats has become a serious problem for sustainability of the fisheries sector in Pakistan. Among different pollutants, heavy metals are very toxic. Their toxicity can be assessed by using antioxidant enzymes as biomarkers. These enzymes protect the living organisms from the oxidative stress caused by the heavy metals. Therefore, the effect of lead chloride (PbCl2) on the peroxidase enzyme activity in the tissues (liver and kidney) of Cirrhinamrigala was investigated. Four groups of Cirrhinamrigala were exposed, separately, to 96-hr LC50 concentration of PbCl2 along with its sub-lethal concentrations, viz.2/3rd, 1/4th and 1/5th for a period of …
Black-Legged Kittiwake (Rissa Tridactyla) In Karakoram: Record On Vagrancy, Fakhar -I- Abbas, Madeeha Manzoor, Imran Shah, Afsar Mian
Black-Legged Kittiwake (Rissa Tridactyla) In Karakoram: Record On Vagrancy, Fakhar -I- Abbas, Madeeha Manzoor, Imran Shah, Afsar Mian
Journal of Bioresource Management
A Black-legged Kittiwake (Rissa tridactyla; BLK) circumpolar shore bird was recorded on the Borith Lake (36°25'54.31"N, 74°51'44.09"E) 4,000-5,000 km away from the gull family bird's eastern or western normal habitat and 2000 km from its last report few years ago and 1500 km from nearest seashore. This report discusses the possible reasons and so far reported vagrancy of this bird.
Characterization And Analysis Of Pcs1 Gene From Wheat, Haris Ahmed Khan, Ayaz Ahmad, Sehar Nawaz
Characterization And Analysis Of Pcs1 Gene From Wheat, Haris Ahmed Khan, Ayaz Ahmad, Sehar Nawaz
Journal of Bioresource Management
Wheat (Triticum aestivum) is an important cereal crop grown worldwide on large areas. Yields of wheat are decreasing worldwide due to heavy metal contamination. A number of genes have been characterized as those that confer tolerance to cadmium stress. PCS1 is one of them. Phytochelatins have a key role in the detoxification of heavy metals in plants. However, the mechanism behind the detoxification remains unknown and wheat genes related to detoxification have not yet been identified. Here we report the isolation of cDNA encoding of phytochelatin synthase (PCS) from wheat (var. Galaxy 2013). The AtPCS1 cDNA sequence contained …
Effect Of Manganese Chloride (Mncl2) On Peroxidase Activity In Labeo Rohita, Nadia Altaf, Muhammad Javed, Sidra Abbas
Effect Of Manganese Chloride (Mncl2) On Peroxidase Activity In Labeo Rohita, Nadia Altaf, Muhammad Javed, Sidra Abbas
Journal of Bioresource Management
Four groups (n=10) of one year old Labeo rohita were exposed to 96-hr LC50 and sub-lethal (2/3rd, 1/4th and 1/5th) concentrations of MnCl2 for a duration of 30 days in the glass aquaria of 50L water capacity. After an exposure period of 30 days, the activity of peroxidase enzyme in the liver and brain of MnCl2 exposed fish was measured and compared with the control group. Physico-chemical parameters of the test media, viz. pH, dissolved oxygen, carbon dioxide, total ammonia, total hardness, calcium and magnesium were also monitored on a 12 hour basis during the whole experimental duration by following …
College Of Science And Mathematics Newsletter, Fall 2016, College Of Science And Mathematics, Wright State University
College Of Science And Mathematics Newsletter, Fall 2016, College Of Science And Mathematics, Wright State University
College of Science and Mathematics Newsletters
This 6 page newsletter discusses various happenings within the College of Science and Mathematics. It begins with a letter from the dean, and continues on with news, events, alumni news, and other community news.
Water Quality In And Around Glen Helen Nature Preserve Fall 2016, Krista Baumgartner, Kellie Bohrer, Brandon Bresler, Thomas Chenault, Miriam Crane, Jennifer Dean, James Herbort, Kelsey Hood, Megan Shade, Kraig Strayer, Nicholas Yahana, Emily Warren, Ben Silliman, Brandon Myers, Steven Ujvary, Audrey E. Mcgowin
Water Quality In And Around Glen Helen Nature Preserve Fall 2016, Krista Baumgartner, Kellie Bohrer, Brandon Bresler, Thomas Chenault, Miriam Crane, Jennifer Dean, James Herbort, Kelsey Hood, Megan Shade, Kraig Strayer, Nicholas Yahana, Emily Warren, Ben Silliman, Brandon Myers, Steven Ujvary, Audrey E. Mcgowin
Chemistry Faculty Publications
No abstract provided.
Analyzing Clinical Depressive Symptoms In Twitter, Amir Hossein Yazdavar, Hussein S. Al-Olimat, Tanvi Banerjee, Krishnaprasad Thirunarayan, Amit P. Sheth
Analyzing Clinical Depressive Symptoms In Twitter, Amir Hossein Yazdavar, Hussein S. Al-Olimat, Tanvi Banerjee, Krishnaprasad Thirunarayan, Amit P. Sheth
Kno.e.sis Publications
350 million people are suffering from clinical depression worldwide.
An Investigation Of The Major Wheat Weeds In Different Zones Of Dera Ismail Khan, Zahid Usman, Ejaz Ahmad Khan, Iqtidar Hussain, Anis Ali Shah, Kalim Ullah, Muhammad Sadiq
An Investigation Of The Major Wheat Weeds In Different Zones Of Dera Ismail Khan, Zahid Usman, Ejaz Ahmad Khan, Iqtidar Hussain, Anis Ali Shah, Kalim Ullah, Muhammad Sadiq
Journal of Bioresource Management
On account of huge yield losses, weed infestation is a serious threat in wheat crops throughout the country. A comprehensive survey to find out the major weeds in wheat in Dera Ismail Khan was carried out during the crop season of 2012-13. Wheat fields at seed farms of Rakhmanghan, RakhZandani, Rata Kulachi and adjacent farmer’s fields to each seed farm were investigated. Data was collected at the peak growth stage of weeds and the quadratic method was used to record relative density (RD), relative frequency (RF), relative crowding coefficient (RCC) and importance value index (IVI). The results revealed that the …
Metal Mixtures Toxicity And Bioaccumulation In Tilapia Nilotica At 96-Hr Lc50 Exposure, Faiza Ambreen, Muhammad Javed
Metal Mixtures Toxicity And Bioaccumulation In Tilapia Nilotica At 96-Hr Lc50 Exposure, Faiza Ambreen, Muhammad Javed
Journal of Bioresource Management
Laboratory tests were conducted on fingerlings of Tilapia nilotica to check the bioaccumulation patterns of lead (Pb), cadmium (Cd) and cobalt (Co) during acute toxicity at constant water temperature, pH and total hardness. Metal mixtures viz. Lead + Cadmium, Cobalt-Lead and Cadmium-Cobalt were selected to assess the acute toxicity in terms of 96-hr LC50 along with bioaccumulation patterns in selected organs of Tilapia nilotica (skin, muscles and liver). Sensitivity of Tilapia nilotica in terms of 96-hr LC50 for all mixtures varied significantly. The 96-hr LC50 of binary metal mixtures agreed in that order: cadmium-cobalt > lead-cadmium > cobalt-lead with statistically significant differences …
Bistorta Amplexicaulis: A Brief Insight To Its Ethnobotany, Salma Batool, Muhammad Sheeraz Ahmed
Bistorta Amplexicaulis: A Brief Insight To Its Ethnobotany, Salma Batool, Muhammad Sheeraz Ahmed
Journal of Bioresource Management
Bistorta amplexicaulis (D. Don) Greene is an herb that belongs to the Family Polygonaceae. Its local name in Pakistan is Rain and masloon (Saqib and Sultan, 2005) and in India it is Sarbguni (Sharma et al., 2004).
A Survey Of Weed Varieties In Samanabad, Lahore, Sadaf Nazir, Beenish Zia Butt, Anjum Navid
A Survey Of Weed Varieties In Samanabad, Lahore, Sadaf Nazir, Beenish Zia Butt, Anjum Navid
Journal of Bioresource Management
A weed is an herbaceous plant that grows as a wild plant, and is considered a hindrance in the growth of preferred vegetation or cumbering the ground, and has no value for beauty or use. However, some weeds have roles in medicine, ecology and many other fields. A survey was conducted in Lahore to observe the weed varieties present in the area of Samanabad. The present study was carried out in May and June 2014.The primary purpose of the study was to gain knowledge about the availability of the total number of species present in this area. We also assessed …
Status Of Basic Taxonomic Skills In Botanical Articles Related To Azad Jammu And Kashmir, Pakistan: A Review, Arshad Mahmood Khan, Rahmatullah Qureshi, Mirza Faisal Qaseem, Waseem Ahmad, Zafeer Saqib, Tariq Habib
Status Of Basic Taxonomic Skills In Botanical Articles Related To Azad Jammu And Kashmir, Pakistan: A Review, Arshad Mahmood Khan, Rahmatullah Qureshi, Mirza Faisal Qaseem, Waseem Ahmad, Zafeer Saqib, Tariq Habib
Journal of Bioresource Management
The problems of synonymy, incorrect species author citation/abbreviation and spelling errors are hampering botanical research around the globe. This article was aimed to quantify the intensity and errors encountered in this regard in published botanical articles pertaining to the Azad Jammu and Kashmir, Pakistan. To address this issue, 100 articles published in 1999-2015 were reviewed. A total of 5460 entries were processed carefully and 1350 species binomials (excluding repititions) were extracted that were linked with 1333 accepted binomials according to theplantlist.org. Out of these accepted species binomials, 1109 were communicated correctly, whereas the remaining 224 binomials were conveyed in the …
College Of Science And Mathematics Newsletter, Summer 2016, College Of Science And Mathematics, Wright State University
College Of Science And Mathematics Newsletter, Summer 2016, College Of Science And Mathematics, Wright State University
College of Science and Mathematics Newsletters
This 5 page newsletter discusses various happenings within the College of Science and Mathematics. It begins with a letter from the dean, and continues on with news, events, alumni news, and other community news.